Communication device, control method, and storage medium

Abstract

A communication device capable of performing wireless communication based on an IEEE 802.11 standard transmits a wireless frame having a preamble of a physical layer (PHY) and a data field containing data. If a specific condition is satisfied while the communication device is transmitting first data using one or more wireless frames that include information related to data preemption in the preamble, the communication device interrupts transmission of the first data and preemptively transmits second data different from the first data.

1 . A communication device capable of performing wireless communication based on an IEEE 802.11 standard, the communication device comprising:
 one or more memories that store a set of instructions; and   at least one processor that executes the stored instructions to cause the communication device to perform operations comprising:   transmitting a wireless frame having a preamble of a physical layer and a data field following the preamble, the data field containing data,   wherein if a specific condition is satisfied while the communication device is transmitting first data using one or more wireless frames that include information related to data preemption in the preamble, the communication device interrupts transmission of the first data and preemptively transmits second data different from the first data.   
     
     
         2 . The communication device according to  claim 1 , wherein the preamble includes a legacy short training field, a legacy long training field, a legacy signal field, a repeated legacy signal field, a universal signal field, an ultra high reliability short training field, and an ultra high reliability long training field. 
     
     
         3 . The communication device according to  claim 2 ,
 wherein the universal signal field in the preamble includes a subfield indicating whether or not a possibility of the data preemption exists, and   wherein the information related to the data preemption is information indicating the possibility of the data preemption, and if the communication device determines that the possibility of the data preemption exists, the communication device stores the information indicating the possibility of the data preemption in the subfield.   
     
     
         4 . The communication device according to  claim 2 ,
 wherein the wireless frame is a UHR MU PPDU including an ultra high reliability signal field between the universal signal field and the ultra high reliability short training field in the preamble,   wherein the ultra high reliability signal field includes a common field and at least one user field, and   wherein the information related to the data preemption is information indicating a possibility of the data preemption, and if the communication device determines that the possibility of the data preemption exists, the communication device stores the information indicating the possibility of the data preemption in the common field.   
     
     
         5 . The communication device according to  claim 1 , wherein the preamble of the wireless frame including the information related to the data preemption of the transmitted data further includes second information indicating a timing at which the data preemption is possibly performed. 
     
     
         6 . The communication device according to  claim 1 , wherein the operations further comprise resuming transmission of remaining data for which transmission is not completed and that is included in the first data for which the transmission is interrupted, the transmission of the remaining data being resumed after the second data is preemptively transmitted. 
     
     
         7 . The communication device according to  claim 1 , wherein in a case where the transmission of the first data is to be interrupted, the communication device notifies a receiver who receives the wireless frame of information indicating an interruption of the transmission via the wireless frame, interrupts the transmission of the first data, and subsequently transmits a second wireless frame to transmit the second data toward a destination different from a destination for the wireless frame. 
     
     
         8 . The communication device according to  claim 1 ,
 wherein the second data indicates that low-latency communication is to be performed, and the first data has a lower priority level for transmission than the second data, and   wherein if the second data is contained in a transmission queue while the first data is being transmitted using the wireless frame, the communication device interrupts the transmission of the first data and preemptively transmits the second data different from the first data.   
     
     
         9 . A communication device capable of performing wireless communication based on an IEEE 802.11 standard, the communication device comprising:
 one or more memories that store a set of instructions; and   at least one processor that executes the stored instructions to cause the communication device to perform operations comprising:   receiving first data using one or more wireless frames including a preamble of a physical layer and a data field following the preamble, the preamble including information related to data preemption; and   stopping a reception process of the first data if information indicating that transmission of the first data is to be interrupted is received before the first data is completely received.   
     
     
         10 . A control method for a communication device capable of performing wireless communication based on an IEEE 802.11 standard, the control method comprising:
 transmitting first data using one or more wireless frames having a preamble of a physical layer and a data field following the preamble, the data field containing data; and   interrupting transmission of first data and preemptively transmitting second data different from the first data if a specific condition is satisfied while the communication device is transmitting the first data using one or more wireless frames that include information related to data preemption in the preamble.   
     
     
         11 . A control method for a communication device capable of performing wireless communication based on an IEEE 802.11 standard, the control method comprising:
 receiving first data using a wireless frame including a preamble of a physical layer and a data field following the preamble, the preamble including information related to data preemption; and   stopping a reception process of the first data if information indicating that transmission of the first data is to be interrupted is received before the first data is completely received.   
     
     
         12 . A non-transitory computer readable storage medium storing a program causing, when the program is executed by at least one processor, a computer to function as the communication device according to  claim 1 . 
     
     
         13 . A non-transitory computer readable storage medium storing a program causing, when the program is executed by at least one processor, a computer to function as the communication device according to  claim 9 .